nvd-json-data-feeds/CVE-2024/CVE-2024-499xx/CVE-2024-49983.json

{
  "id": "CVE-2024-49983",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-10-21T18:15:18.797",
  "lastModified": "2024-10-29T16:23:31.943",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free\n\nWhen calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(),\nthe 'ppath' is updated but it is the 'path' that is freed, thus potentially\ntriggering a double-free in the following process:\n\next4_ext_replay_update_ex\n  ppath = path\n  ext4_force_split_extent_at(&ppath)\n    ext4_split_extent_at\n      ext4_ext_insert_extent\n        ext4_ext_create_new_leaf\n          ext4_ext_grow_indepth\n            ext4_find_extent\n              if (depth > path[0].p_maxdepth)\n                kfree(path)                 ---> path First freed\n                *orig_path = path = NULL    ---> null ppath\n  kfree(path)                               ---> path double-free !!!\n\nSo drop the unnecessary ppath and use path directly to avoid this problem.\nAnd use ext4_find_extent() directly to update path, avoiding unnecessary\nmemory allocation and freeing. Also, propagate the error returned by\next4_find_extent() instead of using strange error codes."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: eliminar ppath de ext4_ext_replay_update_ex() para evitar una doble liberaci\u00f3n Al llamar a ext4_force_split_extent_at() en ext4_ext_replay_update_ex(), se actualiza 'ppath' pero es 'path' el que se libera, lo que potencialmente desencadena una doble liberaci\u00f3n en el siguiente proceso: ext4_ext_replay_update_ex ppath = path ext4_force_split_extent_at(&ppath) ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf ext4_ext_grow_indepth ext4_find_extent if (depth > path[0].p_maxdepth) kfree(path) ---> path Primero liberado *orig_path = path = NULL ---> null ppath kfree(path) ---> path double-free !!! Por lo tanto, elimine el ppath innecesario y use path directamente para evitar este problema. Y use ext4_find_extent() directamente para actualizar path, evitando la asignaci\u00f3n y liberaci\u00f3n de memoria innecesaria. Adem\u00e1s, propague el error devuelto por ext4_find_extent() en lugar de usar c\u00f3digos de error extra\u00f1os."
    }
  ],
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
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      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-415"
        }
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